Evaporative solenoid control valve with enhanced durability features
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United States of America Patent
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-
Dec 14, 2004
Grant Date -
Feb 20, 2003
app pub date -
Aug 20, 2001
filing date -
Aug 20, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An evaporative solenoid valve assembly for use in a vehicle fuel system between a filtration canister and an intake manifold includes a plunger having a plunger body with central-bore and an elastomeric insert molded therein to define a stop cushion at the end of the insert proximal the valve stop and a valve tip at the end of the insert proximal the valve seat. The valve assembly may include a valve stop having a non-conducting insert received in an end proximal the plunger to reduce noise and wear as well as to improve magnetic flux path. Yet another improvement includes an enlarged pre-load spring disposed within the plunger to provide better spring force distribution and plunger to valve seat alignment.
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